ENH: change argList get<> and getList<> from read<>, readList<>

- more consistent with dictionary method naming. The get<> or
  getList<> returns a value, doesn't read into a existing location.

applications/test/surfaceMeshConvert/Test-surfaceMeshConvert.C

@@ -138,7 +138,7 @@ int main(int argc, char *argv[])
     #include "setRootCase.H"
 
     const bool     optStdout = args.found("stdout");
-    const scalar scaleFactor = args.lookupOrDefault("scale", 0.0);
+    const scalar scaleFactor = args.lookupOrDefault<scalar>("scale", 0);
 
     const fileName importName = args[1];
     const fileName exportName = optStdout ? "-stdout" : args[2];